projects.mako.cc - selectricity/blob - app/models/quick_vote.rb

   1 class QuickVote < Election
   2   after_validation :create_candidates
   3   validates_uniqueness_of :name
   4   attr_accessor :raw_candidates
   5   attr_accessor :reviewed
   6   attr_accessor :plurality_result
   7   attr_accessor :approval_result
   8   attr_accessor :condorcet_result
   9   attr_accessor :ssd_result
  10   attr_accessor :borda_result
  11
  12   def validate
  13     if @raw_candidates.length < 2
  14       errors.add("You must list at least two candidates.")
  15     end
  16
  17     if name =~ /[^A-Za-z0-9]/
  18       errors.add("The name must only include numbers and letters.")
  19     end
  20   end
  21
  22   def initialize(params={})
  23     super
  24     self.startdate = Time.now
  25     self.enddate =  Time.now + 30.days
  26     self.active = 1
  27     self.anonymous = 1
  28   end
  29
  30   def candidatelist=(candlist)
  31     @raw_candidates = candlist
  32   end
  33
  34   def name
  35     read_attribute( :name ).downcase()
  36   end
  37
  38   def reviewed?
  39     reviewed.to_i == 1
  40   end
  41
  42   def create_candidates
  43     @raw_candidates.each do |name|
  44       candidate = Candidate.new({:name => name})
  45       self.candidates << candidate
  46     end
  47   end
  48
  49   #Calculate Election Results
  50   def results
  51     # initalize the tallies to empty arrays
  52     preference_tally = Array.new
  53     plurality_tally = Array.new
  54     approval_tally = Array.new
  55
  56     self.voters.each do |voter|
  57       # skip if the voter has not voted or has an unconfirmed vote
  58       next unless voter.voted?
  59
  60       plurality_tally << voter.vote.rankings.sort[0].candidate.id
  61       approval_tally << voter.vote.rankings.sort[0..1].collect \
  62         { |ranking| ranking.candidate.id }
  63       preference_tally << voter.vote.rankings.sort.collect \
  64         { |ranking| ranking.candidate.id }
  65     end
  66     @plurality_result = PluralityVote.new(plurality_tally).result
  67     @approval_result = ApprovalVote.new(approval_tally).result
  68     @condorcet_result = PureCondorcetVote.new(preference_tally).result
  69     @ssd_result = CloneproofSSDVote.new(preference_tally).result
  70     @borda_result = BordaVote.new(preference_tally).result
  71     #@runoff_result = InstantRunoffVote.new(preference_tally).result
  72     #@runoff_results = PluralityVote.new(preference_tally).result
  73
  74   end
  75
  76   ### Convert a shortname or id into a QuickVote
  77   def self.ident_to_quickvote(ident)
  78     return nil unless ident
  79     if ident.match(/^\d+$/)
  80       quickvote = QuickVote.find(ident)
  81     else
  82       quickvote = QuickVote.find_all(["name = ?", ident])[0]
  83     end
  84
  85     return quickvote
  86   end
  87 end